单项选择题

Because of a recent obstacle in production, sales have dropped and accordingly profits have ______.

A．declined
B．increased
C．broken
D．maintained
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单项选择题
Tom could hardly ______ his excitement as he knew that he had made a real discovery.
A．conceal
B．reveal
C．show
D．discover
单项选择题
Proper clothes ______ for much in business. That's why you see most business people dress formally.
A．count
B．account
C．allow
D．care
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